问signed_in？功能不在Rails教程第8-9章中工作(Hartl)

EN

  1) User pages edit with valid information should have link "Sign out", {:href=>"/signout"}
 Failure/Error: it { should have_link('Sign out', href: signout_path)   }
   expected #has_link?("Sign out", {:href=>"/signout"}) to return true, got false
 # ./spec/requests/user_pages_spec.rb:80:in `block (4 levels) in <top (required)>'

describe "User pages" do

  subject { page }

  ...

  describe "edit" do
    let(:user) { FactoryGirl.create(:user) }
    before { visit edit_user_path(user) }

    ...

    describe "with valid information" do 
        let(:new_name)  { "New Name" }
        let(:new_email) { "new@example.com"}
        before do
            fill_in "Name",         with: new_name
            fill_in "Email",        with: new_email
            fill_in "Password",     with: user.password
            fill_in "Confirm Password",     with: user.password
            click_button "Save changes"
        end

        it { should have_title(new_name) }
        it { should have_selector('div.alert.alert-success')    }
        it { should have_link('Sign out', href: signout_path)   }
        specify { expect(user.reload.name).to   eq new_name     }
        specify { expect(user.reload.email).to  eq new_email    }
    end
  end
end

        <% if signed_in? %>
          <li><%= link_to "Users", '#' %></li>
          <li id="fat-menu" class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
              Account <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
              <li><%= link_to "Profile", current_user %></li>
              <li><%= link_to "Settings", edit_user_path(current_user) %></li>
              <li class="divider"></li>
              <li>
                <%= link_to "Sign out", signout_path, method: "delete" %>
              </li>
            </ul>
          </li>
        <% else %>
          <li><%= link_to "Sign in", signin_path %></li>
        <% end %>